Headset



FIG. 1 is a front perspective view of a headset showing my new design;

FIG. 2 is a front view thereof, the front portion of the bottom view is not part of the claimed design;

FIG. 3 is a right side perspective view thereof; and,

FIG. 4 is a left side view thereof.

The broken line showing environmental structure and surface ornamentation is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a headset, as shown and described. 